Question

A rectangle has a length say 'l' and breadth say 'b'. The length is increased,
and breadth is decreased by 4 units. The perimeter does not change and so
does the area of rectangle. Which among below is a relation between length
and breadth?
(a) b -I = 4 (b) l – b = 4 (c) - l- b = 4 (d) l + b =4

Answer 1

Answer:

(a)

area =

lb= (l+4)(b-4)

lb=lb-4l+4b-16

16=+4(-l+ b)

4=b-l

option A is correct